#include<iostream>

int main()
{
	using namespace std;

	int age(int);
	cout << age(5) << endl;
	return 0;
}

int age(int n)
{
	int c;
	if (n == 1)
	{
		c = 10;
	}

	else c = age(n - 1) + 2;
	return c;
}